158 JOURNAL, NATURAL HIST. SOCIETY OF SIAM Vol. If. 
This view of the case is much more satisfactory than the opimion 
held by recent workers, for the type of the jinlaysoni group will then 
be one of the mainland animals and not a degenerate island form, 
which on account of its small size and rather yellower colour, requires 
a separate name and may be known as :— 
Sciurus finlaysoni portus. 
Seiurus jsinlaysoni, Anderson, loc. cit. supra; Flower (partim) 
PZ. S. 1900, p. 355; Wroughton, Ann. and Mag. Nat. Hist., ser. 8, 
vol. II, p. 398 (1908) ; Gyldenstolpe (partim) Arkiv for Zoologi, Band 
8, no. 23, p. 11 (1914). 
Type. Adult male (skin and skull) No. 1988/CBK. Collected on 
Koh Si Chang, Inner Gulf of Siam, 26th January, 1915. 
Characters. Like S. finlaysoni finlaysoni of the Siamese mainland 
but smaller and rather yellower, 
Colour. Ivory yellow throughout, most intense on the upper 
surface and tail; but paler, almost white, on sides of head, chin and 
forélimbs. Skins of nostrils, lip, ears, soles of both feet, genitals black. 
Hyes black. Vibrissae black, 
Measurements. War 17.5* Skull: basilar length 36.5, brainease 
breadth 21.7, proximal breadth of nasals 3.3, distal breadth of nasals 
6.6. For other measurements see table p. 161. ars of the series 
17—19 mm. 
Specimens examined. ‘Twenty-seven ; fifteen males and twelve 
females, all from the type locality. 
Remarks. 1 found S. f. portus very common on Koh Si Chang 
and very fearless. Its small size is due to its insular habitat and to 
the poverty of the vegetation, large scrub rather than forest, with 
which the island is covered. It runs busily about the stems and 
branches, often almost descending to the ground, in its search for food. 
The pelage of many of the animals obtained is considerably abraded 
and in every case has a sticky feeling very different from the smooth 
glossy hair of other squirrels, while both as skins and in the flesh a 
peculiar characteristic odour attaches to them, 
In the series a number of animals have black vibrissae like the 
type, in an equal number the vibrissae are pure white, while some have 
* AJ] measurements in millimetres. 
_—— a. 
